<?php

class TimezoneDTO {

    public $Label;
    public $Name;
    public $Offset;
    public $OffsetHours;
    public $OffsetMinutes;

    public function __construct($name) {
        $tz = new DateTimeZone($name);
        $this->Name = $tz->getName();
        $this->Offset = $tz->getOffset(new DateTime());
        $this->OffsetHours = $this->Offset / 3600;
        $this->OffsetMinutes = $this->Offset % 3600 / 60;
        $this->Label = sprintf('UTC%+03d:%02d %s', $this->OffsetHours, $this->OffsetMinutes, $this->Name);
    }

    public static function __compare(TimezoneDTO $tz1, TimezoneDTO $tz2) {
        $diff = $tz1->Offset - $tz2->Offset;
        return ($diff == 0) ? strcmp($tz1->Name, $tz2->Name) : $diff;
    }

}

?>